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  A type-II clathrate with a Li-Ge framework

Böhme, B., Wei, K., Bobnar, M., Prots, Y., Burkhardt, U., Baitinger, M., et al. (2017). A type-II clathrate with a Li-Ge framework. Zeitschrift für Kristallographie: International Journal for Structural, Physical, and Chemical Aspects of Crystalline Materials, 232(7-9), 543-556. doi:10.1515/zkri-2017-2046.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-CA8B-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-2483-2
Genre: Journal Article

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 Creators:
Böhme, Bodo1, Author              
Wei, Kaya2, Author              
Bobnar, Matej2, Author              
Prots, Yurii3, Author              
Burkhardt, Ulrich4, Author              
Baitinger, Michael5, Author              
Nolas, George S.6, Author
Grin, Yuri7, Author              
Affiliations:
1Bodo Böhme, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863408              
2Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
3Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863424              
4Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863422              
5Michael Baitinger, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863416              
6External Organizations, ou_persistent22              
7Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              

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 Abstract: Na (16) Cs (8) Li x Ge (136-x) ( x approximate to 2.8, space group Fd (3) over barm) is the first intermetallic type-II clathrate with a lithiumsubstituted framework. The phase was obtained from the elements in sealed Ta ampoules by annealing at 650 degrees C for 5 days. Samples were investigated by synchrotron X-ray powder diffraction, solid-state NMR, microstructure and chemical analysis. The substitution of Ge by Li atoms causes a marked shrinking of the lattice parameter. Studies by Li-7 NMR confirmed the presence of Li in the clathrate phase and the Na-23 and Cs-133 NMR spectra consistently showed distinct changes as compared to the ternary Na (16) Cs-8 Ge-136. The SEDOR technique revealed a distance between Li and Cs atoms in agreement with the result of crystal structure refinement, indicating Li substitution at site 96g. The distinct Knight shift of all NMR signals implies metallic behaviour of the clathrate phase, measurements of the magnetic susceptibility indicate diamagnetic behaviour.

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Language(s): eng - English
 Dates: 2017-05-042017-05-04
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000405516600006
DOI: 10.1515/zkri-2017-2046
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Title: Zeitschrift für Kristallographie: International Journal for Structural, Physical, and Chemical Aspects of Crystalline Materials
  Other : Z. Kristallogr.
Source Genre: Journal
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Publ. Info: München : Oldenbourg Wissenschaftsverlag
Pages: - Volume / Issue: 232 (7-9) Sequence Number: - Start / End Page: 543 - 556 Identifier: ISSN: 0044-2968
CoNE: /journals/resource/110978984076855_1